Mix flour, baking powder, baking soda, and salt in a zip-loc.In a pot, melt the butter.Mix the sugar into the butter.Mix in eggs and vanilla.Slowly add flour mixture, stirring well.When the batter is smooth but thick, pour into dutch oven.Sprinkle chocolate chips and pecans on top.Cover and Bake at 350 degrees, checking at about 20 minutes to see if center is cooked.